A sucker rod anti-deviation centralizing device

Abstract

A sucker rod anti-deviation and straightening device, this utility model relates to the field of oilfield equipment technology; a limiting ring is movably sleeved on the sucker rod; a fixed sleeve is sleeved and fixed on the sucker rod, and the fixed sleeve is located on the upper side of the convex ring; several telescopic connectors are distributed equiangularly around the outside of the fixed sleeve, and the upper end of the telescopic connector is hinged to the fixed sleeve, and the lower end of the telescopic connector is hinged to the limiting ring; two connecting frames are symmetrically fixed on the bottom of the limiting ring; the connecting sleeve is movably sleeved on the sucker rod, and the connecting sleeve is located on the lower side of the convex ring, and the bottom end of the connecting frame is fixed on the outer ring wall of the connecting sleeve; several buffers are distributed equiangularly around the inside of the connecting sleeve; the telescopic connection supports the moving sucker rod, making its movement stable and maintaining a vertical state, and the buffers prevent the sucker rod from deviating and avoid friction between the sucker rod and the tubing.

Description

Technical Field

[0001] This utility model relates to the field of oilfield equipment technology, specifically to a sucker rod anti-deviation and straightening device. Background Technology

[0002] Oil pumping unit-deep well pump (also known as rod pump) oil production is currently the most widely used mechanical oil production method in the world. Its core working principle is that the surface pumping unit drives the downhole sucker rod string to move up and down reciprocatingly, which drives the plunger pump at the bottom of the well to work, thereby lifting the crude oil to the surface. In an ideal vertical wellbore, the sucker rod string can theoretically keep its reciprocating motion roughly near the center of the tubing. Even in nominally vertical wells, due to geological conditions, drilling technology and other factors, the actual wellbore trajectory often has varying degrees of curvature. The reciprocating motion of the sucker rod string comes into contact with the inner wall of the tubing for a long time and at a high frequency, causing the tubing wall to thin or even wear through, resulting in tubing leakage and the well being unable to produce normally. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a simple, reasonably designed, and easy-to-use sucker rod anti-deviation and straightening device. It supports the moving sucker rod through a telescopic connection, making its movement stable and keeping it in a vertical state. The buffer component prevents the sucker rod from shifting and avoids friction between the sucker rod and the tubing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: it includes a convex ring, which is sleeved and fixed on the sucker rod; and further includes: A limiting ring is movably sleeved on the sucker rod and is located on the upper side of the convex ring. A fixing sleeve is fitted and fixed onto the sucker rod, and the fixing sleeve is located on the upper side of the convex ring; The telescopic connector comprises several telescopic connectors, which are circumferentially and angularly distributed on the outside of the fixed sleeve. The upper end of the telescopic connector is hinged to the fixed sleeve, and the lower end of the telescopic connector is hinged to the limiting ring. Connecting frame, wherein there are two connecting frames, which are symmetrically fixedly installed at the bottom of the limiting ring; A connecting sleeve is movably fitted onto the sucker rod and is located on the lower side of the convex ring. The bottom end of the connecting frame is fixedly located on the outer ring wall of the connecting sleeve. A buffer component, comprising several buffer components, is disposed circumferentially and diagonally within the connecting sleeve; With the above technical solution design, the limiting ring is fixed to the upper side of the wellhead and does not move. When the sucker rod moves, it drives the fixed sleeve to move together. When the fixed sleeve moves, it is connected to the limiting sleeve through the telescopic connector to keep the sucker rod moving vertically.

[0005] As a further improvement of this utility model, the telescopic connector includes: The upper hinge block is fixedly mounted on the outer ring wall of the fixed sleeve. The lower hinge block is fixedly disposed on the inner ring wall of the limiting ring; The upper movable block is hinged to the upper hinge block via a hinge shaft; The lower moving block is hinged to the lower hinge block via a hinge shaft, and the upper moving block is movably inserted inside the lower moving block; and a first spring is provided at the bottom of the upper moving block, with the bottom end of the first spring connected to the inner bottom surface of the lower moving block. Through the above technical solution design, when the fixed sleeve moves, it drives the upper moving block to move. The movement of the upper moving block compresses the No. 1 spring to provide movable support for the fixed sleeve.

[0006] As a further improvement of this utility model, a support rod is fixedly provided at the bottom of the upper moving block, and the upper end of the No. 1 spring is sleeved and fixed on the support rod. Through the above technical solution design, the support rod connects the No. 1 spring to the upper moving block.

[0007] As a further improvement of this utility model, the buffer includes: A fixing post is fixedly installed on the inner ring wall of the connecting sleeve; The movable rod passes through the fixed column, and a second spring is movably sleeved on the movable rod, with the outer end of the second spring connected to the fixed column. The buffer ball is fixedly installed at the inner end of the movable rod, and the inner end of the second spring is connected to the buffer ball. Through the above technical solution design, when the sucker rod moves, it squeezes the buffer ball, and the buffer ball squeezes the second spring. When the second spring is squeezed to the point where it can no longer be squeezed, this is the maximum value of the sucker rod's deflection, thus preventing the sucker rod from continuing to deflect.

[0008] As a further improvement of this utility model, the buffer ball is provided with an anti-friction sleeve, and the anti-friction sleeve is located on the side close to the sucker rod. Through the above technical solution design, the sucker rod squeezes the buffer ball while the anti-friction sleeve protects the sucker rod.

[0009] The working principle of this utility model is as follows: The limiting ring is fixed to the upper side of the wellhead. During the movement of the sucker rod, it drives the fixed sleeve to move together. When the fixed sleeve moves, it drives the upper moving block to move. The movement of the upper moving block compresses the No. 1 spring. The upper moving block and the lower moving block form a telescopic mode to provide movable support for the fixed sleeve and keep the sucker rod moving vertically. At the same time, the sucker rod compresses the buffer ball, and the buffer ball compresses the No. 2 spring. When the No. 2 spring is compressed to the point where it can no longer be compressed, this is the maximum value of the sucker rod's deflection, which prevents the sucker rod from continuing to deflect and keeps the sucker rod in a vertical position when it continues to move.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. Add a limiting ring to the upper side of the wellhead. When the sucker rod moves, it will drive the fixed sleeve to move. By setting the telescopic connector, the moving sucker rod can be kept stable and the deviation can be reduced. 2. The upper moving block, the lower moving block, and the No. 1 spring work together to form a telescopic support to support the moving fixed sleeve. 3. When the sucker rod moves, it squeezes the buffer ball, and the second spring is compressed; when the second spring can no longer be compressed, the sucker rod can no longer deflect and remains in a vertical state. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0013] Figure 3 This is a structural schematic diagram of the telescopic connector in this utility model.

[0014] Figure 4 This is a schematic diagram of the buffer component in this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Convex ring; 2. Sucker rod; 3. Limiting ring; 4. Fixing sleeve; 5. Telescopic connector; 5-1. Upper hinge block; 5-2. Lower hinge block; 5-3. Upper moving block; 5-4. Lower moving block; 5-5. Spring No. 1; 5-6. Support rod; 6. Connecting frame; 7. Connecting sleeve; 8. Buffer; 8-1. Fixing column; 8-2. Moving rod; 8-3. Spring No. 2; 8-4. Buffer ball; 8-5. Anti-friction sleeve. Detailed Implementation

[0016] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] Example 1: Please see Figures 1-4 This embodiment includes a convex ring 1, which is sleeved and fixed on the sucker rod 2; it also includes: The limiting ring 3 is movably sleeved on the sucker rod 2 and is located on the upper side of the convex ring 1. The fixing sleeve 4 is sleeved and fixed on the sucker rod 2, and the fixing sleeve 4 is located on the upper side of the convex ring 1; Telescopic connector 5, there are several telescopic connectors 5, which are distributed circumferentially on the outside of the fixed sleeve 4, and the upper end of the telescopic connector 5 is hinged to the fixed sleeve 4, and the lower end of the telescopic connector 5 is hinged to the limiting ring 3. Connecting frame 6, there are two connecting frames 6, which are symmetrically fixed to the bottom of the limiting ring 3; The connecting sleeve 7 is movably sleeved on the sucker rod 2 and is located on the lower side of the convex ring 1. The bottom end of the connecting bracket 6 is fixedly located on the outer ring wall of the connecting sleeve 7. Buffer element 8, wherein there are several buffer elements 8, which are respectively arranged circumferentially and diagonally inside the connecting sleeve 7; With the above technical solution design, the limiting ring 3 is fixed to the upper side of the wellhead and does not move. When the sucker rod 2 moves, it drives the fixing sleeve 4 to move together. When the fixing sleeve 4 moves, it is connected to the limiting sleeve through the telescopic connector 5 to keep the sucker rod 2 moving vertically.

[0018] Example 2: Please see Figures 1-4 Based on Embodiment 1, a further improvement is made, wherein the telescopic connector 5 comprises: Upper hinge block 5-1, wherein the upper hinge block 5-1 is fixedly disposed on the outer ring wall of the fixed sleeve 4; The lower hinge block 5-2 is fixedly disposed on the inner ring wall of the limiting ring 3; Upper movable block 5-3 is hinged to upper hinge block 5-1 via a hinge shaft; The lower moving block 5-4 is hinged to the lower hinge block 5-2 via a hinge shaft, and the upper moving block 5-3 is movably inserted inside the lower moving block 5-4; a first spring 5-5 is provided at the bottom of the upper moving block 5-3, and the bottom end of the first spring 5-5 is connected to the inner bottom surface of the lower moving block 5-4; a support rod 5-6 is fixedly provided at the bottom of the upper moving block 5-3, and the upper end of the first spring 5-5 is sleeved and fixed on the support rod 5-6; Through the above technical solution design, when the fixed sleeve 4 moves, it drives the upper moving block 5-3 to move. The movement of the upper moving block 5-3 compresses the first spring 5-5 to provide movable support for the fixed sleeve 4.

[0019] Example 3: Please see Figures 1-4 Based on Embodiment 1, a further improvement is made, wherein the buffer 8 comprises: Fixed post 8-1, the fixed post 8-1 is fixedly installed on the inner ring wall of the connecting sleeve 7; The movable rod 8-2 passes through the fixed column 8-1, and a second spring 8-3 is movably sleeved on the movable rod 8-2. The outer end of the second spring 8-3 is connected to the fixed column 8-1. The buffer ball 8-4 is fixedly installed at the inner end of the movable rod 8-2, and the inner end of the second spring 8-3 is connected to the buffer ball 8-4; the buffer ball 8-4 is provided with an anti-friction sleeve 8-5, and the anti-friction sleeve 8-5 is located on the side close to the sucker rod 2. Through the above technical solution design, when the sucker rod 2 moves, it squeezes the buffer ball 8-4, and the buffer ball 8-4 is forced to squeeze the second spring 8-3; when the second spring 8-3 is squeezed to the point that it can no longer be squeezed, this is the maximum value of the deflection of the sucker rod 2, thus preventing the sucker rod 2 from continuing to deflect.

[0020] When using this utility model, the limiting ring 3 is fixed to the upper side of the wellhead and does not move. During the movement of the sucker rod 2, it drives the fixed sleeve 4 to move together. When the fixed sleeve 4 moves, it drives the upper moving block 5-3 to move. The movement of the upper moving block 5-3 compresses the first spring 5-5. The upper moving block 5-3 and the lower moving block 5-4 form a telescopic mode to provide movable support for the fixed sleeve 4 and keep the sucker rod 2 moving vertically. When the sucker rod 2 moves, it squeezes the buffer ball 8-4. The buffer ball 8-4 is forced to squeeze the second spring 8-3. When the second spring 8-3 is squeezed to the point where it can no longer be squeezed, this is the maximum value of the deflection of the sucker rod 2, which prevents the sucker rod 2 from continuing to deflect and keeps the sucker rod 2 in a vertical position when it continues to move.

[0021] Compared with the prior art, the beneficial effects of this utility model are: 1. A limiting ring 3 is added to the upper side of the wellhead. When the sucker rod 2 moves, it drives the fixed sleeve 4 to move. The telescopic connector 5 is used to keep the moving sucker rod 2 stable and reduce the occurrence of deviation. 2. The upper moving block 5-3, the lower moving block 5-4 and the first spring 5-5 work together to form a telescopic support to support the moving fixed sleeve 4. 3. When the sucker rod 2 moves, it squeezes the buffer ball 8-4, and the second spring 8-3 is compressed by force; when the second spring 8-3 can no longer be compressed, the sucker rod 2 can no longer deflect and remains in a vertical state.

[0022] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sucker rod anti-deviation and straightening device, comprising a convex ring (1), wherein the convex ring (1) is sleeved and fixed on the sucker rod (2); Its features are, Also includes: The limiting ring (3) is movably sleeved on the sucker rod (2) and the limiting ring (3) is located on the upper side of the convex ring (1); The fixing sleeve (4) is fitted and fixed on the sucker rod (2), and the fixing sleeve (4) is located on the upper side of the convex ring (1); Telescopic connector (5), there are several telescopic connectors (5), which are distributed circumferentially on the outside of the fixed sleeve (4), and the upper end of the telescopic connector (5) is hinged to the fixed sleeve (4), and the lower end of the telescopic connector (5) is hinged to the limiting ring (3). Connecting frame (6), there are two connecting frames (6), which are symmetrically fixed to the bottom of the limiting ring (3); Connecting sleeve (7), the connecting sleeve (7) is movably sleeved on the sucker rod (2), and the connecting sleeve (7) is located on the lower side of the convex ring (1), and the bottom end of the connecting frame (6) is fixedly located on the outer ring wall of the connecting sleeve (7); The buffer (8) consists of several buffers, which are distributed circumferentially and angularly inside the connecting sleeve (7).

2. The sucker rod anti-deviation and straightening device according to claim 1, characterized in that: The telescopic connector (5) includes: Upper hinge block (5-1), wherein the upper hinge block (5-1) is fixedly disposed on the outer ring wall of the fixed sleeve (4); The lower hinge block (5-2) is fixedly disposed on the inner ring wall of the limiting ring (3); The upper movable block (5-3) is hinged to the upper hinge block (5-1) via a hinge shaft; The lower moving block (5-4) is hinged to the lower hinge block (5-2) via a hinge shaft, and the upper moving block (5-3) is movably inserted inside the lower moving block (5-4); and a first spring (5-5) is provided at the bottom of the upper moving block (5-3), and the bottom end of the first spring (5-5) is connected to the inner bottom surface of the lower moving block (5-4).

3. The sucker rod anti-deviation and straightening device according to claim 2, characterized in that: The bottom of the upper moving block (5-3) is fixedly provided with a support rod (5-6), and the upper end of the first spring (5-5) is sleeved and fixed on the support rod (5-6).

4. The sucker rod anti-deviation and straightening device according to claim 1, characterized in that: The buffer (8) includes: The fixing post (8-1) is fixedly installed on the inner ring wall of the connecting sleeve (7); The movable rod (8-2) passes through the fixed column (8-1), and a second spring (8-3) is movably sleeved on the movable rod (8-2). The outer end of the second spring (8-3) is connected to the fixed column (8-1). The buffer ball (8-4) is fixedly installed at the inner end of the movable rod (8-2), and the inner end of the second spring (8-3) is connected to the buffer ball (8-4).

5. The sucker rod anti-deviation and straightening device according to claim 4, characterized in that: The buffer ball (8-4) is provided with an anti-friction sleeve (8-5), and the anti-friction sleeve (8-5) is located on the side close to the sucker rod (2).

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